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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e747e589b679d6116e0da16e89a4c4e6c625c0ea25a43df6ed9d21f3527fcd8' 
  AND token = 'KAPZEcyZXAOgHD+lfApfdPqUlYkgwXx6IfK1Av9nd8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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