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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65eb344e7882ce03e88f0b641ff736bcde3215851a115e5cc748cb154a5fb30e' 
  AND token = '8pP8w5LBEGhPZvU6XBQM6Ut8doo9girOCMYzExg5yIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}