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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '612e0292425975b1e5c2a9c99fad1fc23d2e63fa24402fbaa0c0eeebba476545' 
  AND token = 'zMrzPux2dok+0hXiXo2mEsyzJWsIbsAjdbWGwkK8yCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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