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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe3010158933296f26d9f75a53d06beaadf21d100c1500117f5f2fda08038e7f' 
  AND token = 'rgdXM6DmeHr5Ro7ZwoMGrc4L3VK9znM+IZlv2sabN94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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