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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0211fefd539ebb39e9db789a9215dff948a7445b709408872def0dd96ffd15d7' 
  AND token = 'a4TSFBItehHS9qq+n8mCuAjYH5AO86jtkceHJGX8YI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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