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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca54badcacb9a3950e87a94c50596de9244759201168f8ea6627e5f037e8d763' 
  AND token = 'Lug9f8I9G64rQTvUCXLO1Bzl71+5EMRoVre3Lj98HCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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