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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bca5de0ed34acc48091d4c104da4843522dd1aed615592e2270b9bf599527757' 
  AND token = 'lS2QI5Dn1WRlJi+5I0x0JOXR7CnLw40JZ8NuZRZAxVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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