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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ba3a1381c3cfc41beb5000859f20501928f12723a985986fd5e16e2572688b8' 
  AND token = 'rjUZRUn31fnpdjU3f7Koh4tvXofLpWpyBfYy141pyAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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