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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '194cfd9501ea989ce432d6003c7d799945649b7d72cb8015d3318d9e2dbdea30' 
  AND token = '9+2oGefX2zNN4r31i1mQSfXxiLb9Y/n9YS5mqK/2opI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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