Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a41cce6342050e677b2a1a096832525eb5a45d6705aea226a6b326d2f9aff57' 
  AND token = '8oinOAr1qjt2Fsjv4JuiUnTXxt7WZEm+Qi93aJC3SYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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