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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '742019e5b43516107177ca0290a0e6e3ed970d53fb3aa57f6c6792f4d880fef6' 
  AND token = '8e6TFnvpkmx5KG44Kt+OuCrgbow7ZlKYsiPtlobwsMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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