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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dd25d5ce99863070dbf953aa594c60cb0cc1699f4bd4c3e6623d78666e3870b' 
  AND token = 'y5W0lHDLZcwiJ31OWBxRXmQpTwNnB981ABRG+060oWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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