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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46a3170ec0af0cca2f1c4ac686171750b173891d30ad500efd5f7b896c6836cd' 
  AND token = 'kNY9tHVRv8k9W8I4RC0TVr1f1TI6tUb5a3FXk26bgnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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