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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a4e9afa7472d7184980790e7b7f6ebc7e77167d21323c385dad2a7a6612e4ca' 
  AND token = '+6WHTUG5yQ3UN2d+sc88QJpkl2ZYa0tm7Dx74KG468I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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