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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd429a1e4ae1718a6be34d2ff123710de7c26db08cdd86dc72fe923015d5768c9' 
  AND token = 'KBaKZ3n5j4D7TrBu30eDX2C62Xkh6+QMuomB2qSRg2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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