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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d5d9d2ca64af87e250f86421ea84b54b6228e1b56c58d9c3a8c9f248792961' 
  AND token = '/Yv20Cr7biD3qn4CZUM+a2AsVRsiPb5VWtvaIomxkVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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