Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e32a9b5a558fc211b04e264dbc3ee13eeb42cff661442bac02b73cb7dc8c591' 
  AND token = '9TdYXfxonjTN541bwtwsIARbrLXAymXXBla+JwTfcrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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