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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '695d3fca8a4fbe6a52f32af79fa3c785ab176d2ec181336a6bc361d7e4aea1ba' 
  AND token = 'PkQ1kaTUcOBhsomQTuQjzrcDzo2zFxEi0JDfXBoyR6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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