SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '654287e6edcae157d29e6fb097c1f051850c3aef05fa0db866023ab4886795cb' 
  AND token = 'q1YmmzTtBpvIj3QPHFu6st1rUuJRUU54TX+K7yo6SiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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