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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd708000b4c4f3da75cb6a42fb01d662df4c30e425ad93c5747ed9c32b176c20d' 
  AND token = 'pU5axK9KXDom23r3GvCiCKqYbTwa6TNGS3T6Fot7E4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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