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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cadd2fb2c1ee180586375af7c5960bb4fb7b33512264f513a74628a9d7638536' 
  AND token = 'lm3Bpbx8R3gULC1ZLLFkwaBEtLwF1jMIvXEFtec0QnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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