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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbcebd13f9274591340eb743ba61ba1c733d1ee4a5b2ac3e8153afef9b7e2ad' 
  AND token = 'OgkD99A8LnAdHZQa/wsRgqGnv19Ha4GCy06+Ux5eeow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}