Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4250d915e9d767d0096e96eb262cd65ff41fb593341f98376f14052e12e64e18' 
  AND token = 'S46Ce/kLAD8GrkuihZwfO94RtiaVcEjdqsW3uNjEI/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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