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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4da501e6f9a5f4c025229f49f21a40d4a52d1ebdc3c027699f922b0f32288d62' 
  AND token = 'bHRRnXTbXKdXGurfpIIH8drbnXElNnzWKrVON+Dx7bE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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