Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc0fd47088e8e996f8c70ab75da4577f5411fdcce59d1248be010a31969bd48d' 
  AND token = 'LDwcFFLFy9wP9XBi1upEtdVyGQjl1BRMgvc84qhyd/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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