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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c6c7380d0d2e30fd3c931faa3ac12d6e426aa71952c4553bfd043c54ab980b30' 
  AND token = 'WCD2rDMH3OcYUBVQkn/9T6Sq/Fo7CTSJgYwO8V4aMRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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