Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ee8a8aaa2a844aed64232f1ce10cd1d6989ef4e294db7c73185a0fb4a56271a' 
  AND token = 'aR4nvgha8U3x/1vBDMaJ4cTS7uNahlxlG0Ybq2PUU2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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