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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e9f650627fb597ec862a9955c2c0d1bde6fce25b37976a43c9613e02b34c123' 
  AND token = '7fbKcyK3bvgvodUYrjWuQu5w2Ht4R3S6/BTDkye1E2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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