Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc3975d30490da9e951abbcfc95f64957275aac0af8517542d235e2e9e47593b' 
  AND token = 'qfStFNAhVSPwkVloZ3oTqGXRtMrkONrX+ey1+t4dSTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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