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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43e67d06c7d767c02c716cd1e94f985d9551da5869d18e5ef13c612271d6dcab' 
  AND token = 'ClzCGBprZNi8JhcV7Dvfhbg8+S5QkI8VReJmTpO+AV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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