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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0110c993bbf5b530f4cd263cf0403b16f466e2733aba3b10fb3392f07994da2d' 
  AND token = 'uPeO/qda6Xegh/IedHJ5Go4x4iP1aLVbF+hBOYQmau0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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