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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a3eb18b38c9ed017e1661dcfc1f41a58ef198e79b24e7635db6d3a366934cae' 
  AND token = 'a7d65PCdUR3nlTmsdPrkADIc1TnOyblhHiJWip1VL6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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