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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33a58520b847b64099fedc5a4947452d2d054bf236a17e62eede18e9d84a245b' 
  AND token = 'RAqTKZRlMGX6v3Cvk7orfYI9Smd0Gr/Ki/SfnLy3mnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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