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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cb034e83502af52378b008063304df8e6e11d404ce17b9f1e875b09aaf7d8e7' 
  AND token = '00IzXQkgFruHgF/WJ37EPzi1r0Bl4ANcujqdqAsPs38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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