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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad5a4ffe714f36d1d0ea40688290a9932e70233b2912244e348cd3c320508944' 
  AND token = 'cB6Mv5xe9ROUvTFPs1bLeGuESNOuMgRQurzI3L6D/yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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