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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aeefd15aa7c5cea910f74b678ffcc0b7119b3913c21278ee7787f6f0c03485e' 
  AND token = 'RrMbLvUNAQulHsuYfdNLJ7Q7LtjvN47gkk8RolUMjIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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