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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a226d9654b472e809c554db2c29ec7a49bbd82bd3d579f802e54d109464f617' 
  AND token = 'rZK8CD1qlzZ2pLAk1YkGIT69/2EYNs/RFnWODLCce9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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