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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbebcce81b6c956623ad5a5d617ba1938732cf593a63a813bb0711dbc3f8df6' 
  AND token = '7d7oHyG0g5CWWmPHxjN2NXE5/gh/KkW1H6yn6xmgzrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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