Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96b1f39eb2f4ccc3ebe149ce376954590a2dc82102d0cd290dfb1b36ec61ade3' 
  AND token = 'G2e3y4jMayQHo9qlZtFewOZ6+BK6ZfzpfSvvDP/NlaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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