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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e1577a75a907a6f1c8310d2dfb6abc83a6d832ba89013b34ccbc7505bf0dd03' 
  AND token = 'ooM7BfqpbuBAIngk54DT2AQU7bGzpnCLuhCi3ke2dYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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