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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '284237bb323347664dba621acc2dddf1dec5d0ceb3689e681d8587571eb17744' 
  AND token = 'sL3Y99pIUSGY/RTdpLyHFz9NNdQ6N3RZ6hITpIfG3JQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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