Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3010d31ad2c75919faf9aea2ea52c501ae56885f5d1cba4a5eb9abe51e74dbb5' 
  AND token = 'Ka8ZC2rLL6H6KEv+kF+bvUQvcN2nzNpi4/JAN55tpz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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